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Cheap flights from Helena to Illinois from $258

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to Illinois departing on 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Helena to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
6:28 pm - 2:39 pmHLN-ORD
19h 11m1 stop
Alaska Airlines Logo
8:00 am - 5:22 pmORD-HLN
10h 22m1 stop
$258Alaska Airlines
Find Deal
Mon, Dec 15 - Sat, Jan 10
Delta Logo
1:06 pm - 9:21 pmHLN-ORD
7h 15m1 stop
Delta Logo
11:15 am - 10:29 pmORD-HLN
12h 14m2 stops
$264Delta
Find Deal
Mon, Dec 15 - Sat, Jan 10
Delta Logo
1:06 pm - 11:47 pmHLN-MDW
9h 41m2 stops
Delta Logo
11:21 am - 10:29 pmMDW-HLN
12h 08m2 stops
$269Delta
Find Deal
Mon, Dec 15 - Sat, Jan 10
Delta Logo
1:06 pm - 12:01 amHLN-ORD
9h 55m2 stops
Delta Logo
11:15 am - 10:29 pmORD-HLN
12h 14m2 stops
$269Delta
Find Deal
Mon, Dec 15 - Sat, Jan 10
Alaska Airlines Logo
4:10 pm - 11:56 pmHLN-STL
6h 46m1 stop
Alaska Airlines Logo
7:00 am - 3:43 pmSTL-HLN
9h 43m1 stop
$332Alaska Airlines
Find Deal
Sat, Feb 28 - Tue, Mar 3
Delta Logo
1:07 pm - 9:38 pmHLN-STL
7h 31m1 stop
Delta Logo
10:13 am - 10:29 pmSTL-HLN
13h 16m2 stops
$338Delta
Find Deal
Sat, Feb 28 - Tue, Mar 3
United Airlines Logo
2:27 pm - 9:16 pmHLN-MLI
5h 49m1 stop
United Airlines Logo
10:47 am - 9:26 pmMLI-HLN
11h 39m2 stops
$400United Airlines
Find Deal
Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
6:15 am - 4:54 pmHLN-MLI
9h 39m2 stops
United Airlines Logo
10:47 am - 9:26 pmMLI-HLN
11h 39m2 stops
$405United Airlines
Find Deal
Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
2:27 pm - 9:16 pmHLN-MLI
5h 49m1 stop
United Airlines Logo
8:46 am - 1:41 pmMLI-HLN
5h 55m1 stop
$419United Airlines
Find Deal
Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
6:40 am - 7:59 amHLN-ORD
24h 19m2 stops
United Airlines Logo
8:45 am - 1:27 pmORD-HLN
29h 42m2 stops
$683United Airlines
Find Deal
Tue, Nov 25 - Thu, Nov 27

United Airlines flights from Helena to Illinois

Our best United Airlines deals on Helena to Illinois flight tickets
United Airlines
Feb 3
HLN2:27 pmHelena
5h 49m
1 stop
MLI9:16 pmMoline Quad-City
Feb 7
MLI10:47 amMoline Quad-City
11h 39m
2 stops
HLN9:26 pmHelena
$400
Find similar
United Airlines
Feb 3
HLN6:15 amHelena
9h 39m
2 stops
MLI4:54 pmMoline Quad-City
Feb 7
MLI10:47 amMoline Quad-City
11h 39m
2 stops
HLN9:26 pmHelena
$405
Find similar
United Airlines
Feb 3
HLN2:27 pmHelena
5h 49m
1 stop
MLI9:16 pmMoline Quad-City
Feb 7
MLI8:46 amMoline Quad-City
5h 55m
1 stop
HLN1:41 pmHelena
$419
Find similar

Alaska Airlines flights from Helena to Illinois

Our best Alaska Airlines deals on Helena to Illinois flight tickets
Alaska Airlines
Dec 15
HLN6:28 pmHelena
19h 11m
1 stop
ORD2:39 pmChicago O'Hare Intl
Jan 10
ORD8:00 amChicago O'Hare Intl
10h 22m
1 stop
HLN5:22 pmHelena
$258
Find similar
Alaska Airlines
Feb 28
HLN4:10 pmHelena
6h 46m
1 stop
STL11:56 pmLambert-St Louis
Mar 3
STL7:00 amLambert-St Louis
9h 43m
1 stop
HLN3:43 pmHelena
$332
Find similar
Alaska Airlines
Feb 28
HLN4:10 pmHelena
6h 46m
1 stop
STL11:56 pmLambert-St Louis
Mar 3
STL2:55 pmLambert-St Louis
25h 48m
1 stop
HLN3:43 pmHelena
$363
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 5, 2025.
Use the filters below to find and compare flights from Helena to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 12/15

6:28 pm-2:39 pm

1 stop19h 11m

Chicago O'Hare Intl

Sat 1/10

8:00 am-5:22 pm

1 stop10h 22m

$258

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 12/15

1:06 pm-9:21 pm

1 stop7h 15m

Chicago O'Hare Intl

Sat 1/10

11:15 am-10:29 pm

2 stops12h 14m

$264

HelenaChicago

HLN - MDW

HLNMDW

Helena

Mon 12/15

1:06 pm-11:47 pm

2 stops9h 41m

Chicago Midway

Sat 1/10

11:21 am-10:29 pm

2 stops12h 08m

$269

HelenaChicago

HLN - ORD

HLNORD

Helena

Mon 12/15

1:06 pm-12:01 am

2 stops9h 55m

Chicago O'Hare Intl

Sat 1/10

11:15 am-10:29 pm

2 stops12h 14m

$269

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/28

4:10 pm-11:56 pm

1 stop6h 46m

Lambert-St Louis

Tue 3/3

7:00 am-3:43 pm

1 stop9h 43m

$332

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

Sat 2/28

1:07 pm-9:38 pm

1 stop7h 31m

Lambert-St Louis

Tue 3/3

10:13 am-10:29 pm

2 stops13h 16m

$338

HelenaMoline

HLN - MLI

HLNMLI

Helena

Tue 2/3

2:27 pm-9:16 pm

1 stop5h 49m

Moline Quad-City

Sat 2/7

10:47 am-9:26 pm

2 stops11h 39m

$400

HelenaMoline

HLN - MLI

HLNMLI

Helena

Tue 2/3

6:15 am-4:54 pm

2 stops9h 39m

Moline Quad-City

Sat 2/7

10:47 am-9:26 pm

2 stops11h 39m

$405

HelenaMoline

HLN - MLI

HLNMLI

Helena

Tue 2/3

2:27 pm-9:16 pm

1 stop5h 49m

Moline Quad-City

Sat 2/7

8:46 am-1:41 pm

1 stop5h 55m

$419

HelenaChicago

HLN - ORD

HLNORD

Helena

Tue 11/25

6:40 am-7:59 am

2 stops24h 19m

Chicago O'Hare Intl

Thu 11/27

8:45 am-1:27 pm

2 stops29h 42m

$683

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Helena to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Helena to Illinois is on a Wednesday when prices can be found for as low as $680. Flights from Helena to Illinois on a Monday will generally be more expensive and average around $780. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Helena to Illinois during this time can be as low as $620. Flights in the morning are often more expensive with an average ticket price of $708.

Cheap Helena to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to Illinois

Direct flights

None
There are no direct flights from Helena to Illinois. There are no popular flight routes from Helena to Illinois.
Search flight deals

  • When did momondo last update prices for flights from Helena Airport to Illinois?

    Prices for flights from Helena Airport to Illinois refresh daily.

  • How many operators does momondo search for flights from Helena Airport to Illinois?

  • How old do you have to be to fly from Helena Airport to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Helena Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Helena to Illinois

Compare and see reviews for airlines that fly from Helena to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $311Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights
DeltaPriceFrom $314Free CancellationRating
7.9
8,004 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Helena to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Helena to Illinois for you.

Can I find flights from Helena to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Helena on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Helena to Illinois?

momondo helps you find the best flight between Helena and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Helena to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Helena. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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